The San Francisco-based company Chatbase allows you to build an AI chatbot that can be trained on your own data. Just upload a pdf and get a GPT-based chatbot that can answer any question on it.
On the website, users need to upload a document that contains the information that you want your chatbot to train on. A chatbot will then be created for you and will be accessible through a unique link.
Currently, you can upload any PDF as the data source. If you want to integrate Notion, Slack, Substack, and any text/documentation, contact the company. These integrations will be available to do on the website soon. The current limit for data is 1.2M characters. That is about a 600-700 page book.
Although based on GPT, the chatbots are not GPT itself. Chatbase lets you build a GPT-based chatbot that understands any data you give it and can answer questions on it.
Currently, Chatbase only works with PDF documents. However, users will soon be able to submit a link to their website, and the chatbot will scrape the text on it.